1College of Agronomy and Biotechnology,China Agricultural University,Beijing 100193,China|2College of Resources and Environment Sciences,China Agricultural University,Beijing 100193,China
Abstract:We selected the fallow and catch crop treatments in a 3-year old experiment about greenhouse tomato(Lycopersicon esculentum Mill.)in this experiment to study the effects of summer fallow mode and sweet corn planted with straw application mode on soil microbial community structure in different growth stage by applying phospholipid fatty acid(PLFA)analysis and testing technology.The results indicated that compared with the fallow treatment,catch crop,sweet corn planted with straw returned to the field mode could improve microbe in soil of greenhouse tomato.Especially during the blooming period of fall and winter greenhouse tomato,catch crop treatment could increase soil microbial biomass PLFAs content,fungi and bacteria PLFAs content by 18.2%,17.9% and 23.6%,respectively and the Shannon-Wienner H reached 2.07 in the fruiting period,which was increased by 99.04%,compared with fallow treatment.